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d06aae73
编写于
12月 10, 2018
作者:
P
Paul B Mahol
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
avformat: add vividas demuxer
上级
1ead98ff
变更
5
隐藏空白更改
内联
并排
Showing
5 changed file
with
722 addition
and
2 deletion
+722
-2
Changelog
Changelog
+1
-0
libavformat/Makefile
libavformat/Makefile
+1
-0
libavformat/allformats.c
libavformat/allformats.c
+1
-0
libavformat/version.h
libavformat/version.h
+2
-2
libavformat/vividas.c
libavformat/vividas.c
+717
-0
未找到文件。
Changelog
浏览文件 @
d06aae73
...
...
@@ -11,6 +11,7 @@ version <next>:
- dhav demuxer
- PCM-DVD encoder
- GIF parser
- vividas demuxer
version 4.1:
...
...
libavformat/Makefile
浏览文件 @
d06aae73
...
...
@@ -522,6 +522,7 @@ OBJS-$(CONFIG_VC1_DEMUXER) += rawdec.o vc1dec.o
OBJS-$(CONFIG_VC1_MUXER)
+=
rawenc.o
OBJS-$(CONFIG_VC1T_DEMUXER)
+=
vc1test.o
OBJS-$(CONFIG_VC1T_MUXER)
+=
vc1testenc.o
OBJS-$(CONFIG_VIVIDAS_DEMUXER)
+=
vividas.o
OBJS-$(CONFIG_VIVO_DEMUXER)
+=
vivo.o
OBJS-$(CONFIG_VMD_DEMUXER)
+=
sierravmd.o
OBJS-$(CONFIG_VOBSUB_DEMUXER)
+=
subtitles.o
# mpeg demuxer is in the dependencies
...
...
libavformat/allformats.c
浏览文件 @
d06aae73
...
...
@@ -422,6 +422,7 @@ extern AVInputFormat ff_vc1_demuxer;
extern
AVOutputFormat
ff_vc1_muxer
;
extern
AVInputFormat
ff_vc1t_demuxer
;
extern
AVOutputFormat
ff_vc1t_muxer
;
extern
AVInputFormat
ff_vividas_demuxer
;
extern
AVInputFormat
ff_vivo_demuxer
;
extern
AVInputFormat
ff_vmd_demuxer
;
extern
AVInputFormat
ff_vobsub_demuxer
;
...
...
libavformat/version.h
浏览文件 @
d06aae73
...
...
@@ -32,8 +32,8 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 2
4
#define LIBAVFORMAT_VERSION_MICRO 10
1
#define LIBAVFORMAT_VERSION_MINOR 2
5
#define LIBAVFORMAT_VERSION_MICRO 10
0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
...
...
libavformat/vividas.c
0 → 100644
浏览文件 @
d06aae73
/*
* Vividas VIV format Demuxer
* Copyright (c) 2012 Krzysztof Klinikowski
* Copyright (c) 2010 Andrzej Szombierski
* based on vivparse Copyright (c) 2007 Måns Rullgård
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @brief Vividas VIV (.viv) file demuxer
* @author Andrzej Szombierski [qq at kuku eu org] (2010-07)
* @sa http://wiki.multimedia.cx/index.php?title=Vividas_VIV
*/
#include "libavutil/intreadwrite.h"
#include "avio_internal.h"
#include "avformat.h"
#include "internal.h"
#define MAX_AUDIO_SUBPACKETS 100
typedef
struct
VIV_SB_block
{
int
size
,
n_packets
;
int64_t
byte_offset
;
int64_t
packet_offset
;
}
VIV_SB_block
;
typedef
struct
VIV_SB_entry
{
int
size
,
flag
;
}
VIV_SB_entry
;
typedef
struct
VIV_AudioSubpacket
{
int
start
,
pcm_bytes
;
}
VIV_AudioSubpacket
;
typedef
struct
VividasDemuxContext
{
int
n_sb_blocks
;
VIV_SB_block
*
sb_blocks
;
uint32_t
sb_key
;
int64_t
sb_offset
;
int
current_sb
,
current_sb_entry
;
uint8_t
*
sb_buf
;
AVIOContext
*
sb_pb
;
int
n_sb_entries
;
VIV_SB_entry
*
sb_entries
;
int
n_audio_subpackets
;
int
current_audio_subpacket
;
int64_t
audio_sample
;
VIV_AudioSubpacket
audio_subpackets
[
MAX_AUDIO_SUBPACKETS
];
}
VividasDemuxContext
;
static
int
viv_probe
(
AVProbeData
*
p
)
{
if
(
memcmp
(
p
->
buf
,
"vividas03"
,
9
))
return
0
;
return
AVPROBE_SCORE_MAX
;
}
static
const
unsigned
short
keybits
[
32
]
=
{
163
,
416
,
893
,
82
,
223
,
572
,
1137
,
430
,
659
,
1104
,
13
,
626
,
695
,
972
,
1465
,
686
,
843
,
1216
,
317
,
1122
,
1383
,
92
,
513
,
1158
,
1243
,
48
,
573
,
1306
,
1495
,
396
,
1009
,
350
,
};
static
uint32_t
decode_key
(
uint8_t
*
buf
)
{
uint32_t
key
=
0
;
for
(
int
i
=
0
;
i
<
32
;
i
++
)
{
unsigned
p
=
keybits
[
i
];
key
|=
!!
(
buf
[
p
>>
3
]
&
(
1
<<
(
p
&
7
)))
<<
i
;
}
return
key
;
}
static
void
put_v
(
uint8_t
*
p
,
unsigned
v
)
{
if
(
v
>>
28
)
*
p
++
=
((
v
>>
28
)
&
0x7f
)
|
0x80
;
if
(
v
>>
21
)
*
p
++
=
((
v
>>
21
)
&
0x7f
)
|
0x80
;
if
(
v
>>
14
)
*
p
++
=
((
v
>>
14
)
&
0x7f
)
|
0x80
;
if
(
v
>>
7
)
*
p
++
=
((
v
>>
7
)
&
0x7f
)
|
0x80
;
}
static
unsigned
recover_key
(
unsigned
char
sample
[
4
],
unsigned
expected_size
)
{
unsigned
char
plaintext
[
8
]
=
{
'S'
,
'B'
};
put_v
(
plaintext
+
2
,
expected_size
);
return
(
sample
[
0
]
^
plaintext
[
0
])
|
((
sample
[
1
]
^
plaintext
[
1
])
<<
8
)
|
((
sample
[
2
]
^
plaintext
[
2
])
<<
16
)
|
((
sample
[
3
]
^
plaintext
[
3
])
<<
24
);
}
static
void
xor_block
(
void
*
p1
,
void
*
p2
,
unsigned
size
,
int
key
,
int
*
key_ptr
)
{
int
*
d1
=
p1
;
int
*
d2
=
p2
;
int
k
=
*
key_ptr
;
size
>>=
2
;
while
(
size
--
)
{
*
d2
=
*
d1
^
k
;
k
+=
key
;
d1
++
;
d2
++
;
}
*
key_ptr
=
k
;
}
static
void
decode_block
(
uint8_t
*
src
,
uint8_t
*
dest
,
unsigned
size
,
uint32_t
key
,
uint32_t
*
key_ptr
,
int
align
)
{
unsigned
s
=
size
;
char
tmp
[
4
];
int
a2
;
if
(
!
size
)
return
;
align
&=
3
;
a2
=
(
4
-
align
)
&
3
;
if
(
align
)
{
uint32_t
tmpkey
=
*
key_ptr
-
key
;
memcpy
(
tmp
+
align
,
src
,
a2
);
xor_block
(
tmp
,
tmp
,
4
,
key
,
&
tmpkey
);
memcpy
(
dest
,
tmp
+
align
,
a2
);
s
-=
a2
;
}
if
(
s
>=
4
)
{
if
(
!
align
)
align
=
4
;
xor_block
(
src
+
a2
,
dest
+
a2
,
s
&
~
3
,
key
,
key_ptr
);
s
&=
3
;
}
if
(
s
)
{
size
-=
s
;
memcpy
(
tmp
,
src
+
size
,
s
);
xor_block
(
&
tmp
,
&
tmp
,
4
,
key
,
key_ptr
);
memcpy
(
dest
+
size
,
tmp
,
s
);
}
}
static
uint32_t
get_v
(
uint8_t
*
p
)
{
uint32_t
v
=
0
;
do
{
if
(
v
>=
UINT_MAX
/
128
-
*
p
)
return
v
;
v
<<=
7
;
v
+=
*
p
&
0x7f
;
}
while
(
*
p
++
&
0x80
);
return
v
;
}
static
uint8_t
*
read_vblock
(
AVIOContext
*
src
,
uint32_t
*
size
,
uint32_t
key
,
uint32_t
*
k2
,
int
align
)
{
uint8_t
tmp
[
4
];
uint8_t
*
buf
;
unsigned
n
;
if
(
avio_read
(
src
,
tmp
,
4
)
!=
4
)
return
NULL
;
decode_block
(
tmp
,
tmp
,
4
,
key
,
k2
,
align
);
n
=
get_v
(
tmp
);
if
(
!
n
)
return
NULL
;
buf
=
av_malloc
(
n
);
if
(
!
buf
)
return
NULL
;
*
size
=
n
;
n
-=
4
;
memcpy
(
buf
,
tmp
,
4
);
if
(
avio_read
(
src
,
buf
+
4
,
n
)
==
n
)
{
decode_block
(
buf
+
4
,
buf
+
4
,
n
,
key
,
k2
,
align
+
4
);
}
else
{
av_free
(
buf
);
buf
=
NULL
;
}
return
buf
;
}
static
uint8_t
*
read_sb_block
(
AVIOContext
*
src
,
unsigned
*
size
,
uint32_t
*
key
,
unsigned
expected_size
)
{
uint8_t
*
buf
;
uint8_t
ibuf
[
8
],
sbuf
[
8
];
uint32_t
k2
;
unsigned
n
;
if
(
avio_read
(
src
,
ibuf
,
8
)
<
8
)
return
NULL
;
k2
=
*
key
;
decode_block
(
ibuf
,
sbuf
,
8
,
*
key
,
&
k2
,
0
);
n
=
get_v
(
sbuf
+
2
);
if
(
sbuf
[
0
]
!=
'S'
||
sbuf
[
1
]
!=
'B'
||
(
expected_size
>
0
&&
n
!=
expected_size
))
{
uint32_t
tmpkey
=
recover_key
(
ibuf
,
expected_size
);
k2
=
tmpkey
;
decode_block
(
ibuf
,
sbuf
,
8
,
tmpkey
,
&
k2
,
0
);
n
=
get_v
(
sbuf
+
2
);
if
(
sbuf
[
0
]
!=
'S'
||
sbuf
[
1
]
!=
'B'
||
expected_size
!=
n
)
return
NULL
;
*
key
=
tmpkey
;
}
buf
=
av_malloc
(
n
);
if
(
!
buf
)
return
NULL
;
memcpy
(
buf
,
sbuf
,
8
);
*
size
=
n
;
n
-=
8
;
if
(
avio_read
(
src
,
buf
+
8
,
n
)
<
n
)
{
av_free
(
buf
);
return
NULL
;
}
decode_block
(
buf
+
8
,
buf
+
8
,
n
,
*
key
,
&
k2
,
0
);
return
buf
;
}
static
void
track_header
(
VividasDemuxContext
*
viv
,
AVFormatContext
*
s
,
uint8_t
*
buf
,
int
size
)
{
int
i
,
j
;
int64_t
off
;
int
val_1
;
int
num_video
,
num_audio
;
AVIOContext
*
pb
;
pb
=
avio_alloc_context
(
buf
,
size
,
0
,
NULL
,
NULL
,
NULL
,
NULL
);
if
(
!
pb
)
return
;
ffio_read_varlen
(
pb
);
// track_header_len
avio_r8
(
pb
);
// '1'
val_1
=
ffio_read_varlen
(
pb
);
for
(
i
=
0
;
i
<
val_1
;
i
++
)
{
int
c
=
avio_r8
(
pb
);
for
(
j
=
0
;
j
<
c
;
j
++
)
{
avio_r8
(
pb
);
// val_3
avio_r8
(
pb
);
// val_4
}
}
avio_r8
(
pb
);
// num_streams
off
=
avio_tell
(
pb
);
off
+=
ffio_read_varlen
(
pb
);
// val_5
avio_r8
(
pb
);
// '2'
num_video
=
avio_r8
(
pb
);
avio_seek
(
pb
,
off
,
SEEK_SET
);
if
(
num_video
!=
1
)
av_log
(
s
,
AV_LOG_WARNING
,
"number of video tracks %d is not 1
\n
"
,
num_video
);
for
(
i
=
0
;
i
<
num_video
;
i
++
)
{
AVStream
*
st
=
avformat_new_stream
(
s
,
NULL
);
st
->
id
=
i
;
st
->
codecpar
->
codec_type
=
AVMEDIA_TYPE_VIDEO
;
st
->
codecpar
->
codec_id
=
AV_CODEC_ID_VP6
;
off
=
avio_tell
(
pb
);
off
+=
ffio_read_varlen
(
pb
);
avio_r8
(
pb
);
// '3'
avio_r8
(
pb
);
// val_7
st
->
time_base
.
num
=
avio_rl32
(
pb
);
// frame_time
st
->
time_base
.
den
=
avio_rl32
(
pb
);
// time_base
st
->
nb_frames
=
avio_rl32
(
pb
);
// n frames
st
->
codecpar
->
width
=
avio_rl16
(
pb
);
// width
st
->
codecpar
->
height
=
avio_rl16
(
pb
);
// height
avio_r8
(
pb
);
// val_8
avio_rl32
(
pb
);
// val_9
avio_seek
(
pb
,
off
,
SEEK_SET
);
}
off
=
avio_tell
(
pb
);
off
+=
ffio_read_varlen
(
pb
);
// val_10
avio_r8
(
pb
);
// '4'
num_audio
=
avio_r8
(
pb
);
avio_seek
(
pb
,
off
,
SEEK_SET
);
if
(
num_audio
!=
1
)
av_log
(
s
,
AV_LOG_WARNING
,
"number of audio tracks %d is not 1
\n
"
,
num_audio
);
for
(
i
=
0
;
i
<
num_audio
;
i
++
)
{
int
q
;
AVStream
*
st
=
avformat_new_stream
(
s
,
NULL
);
st
->
id
=
num_video
+
i
;
st
->
codecpar
->
codec_type
=
AVMEDIA_TYPE_AUDIO
;
st
->
codecpar
->
codec_id
=
AV_CODEC_ID_VORBIS
;
off
=
avio_tell
(
pb
);
off
+=
ffio_read_varlen
(
pb
);
// length
avio_r8
(
pb
);
// '5'
avio_r8
(
pb
);
//codec_id
avio_rl16
(
pb
);
//codec_subid
st
->
codecpar
->
channels
=
avio_rl16
(
pb
);
// channels
st
->
codecpar
->
sample_rate
=
avio_rl32
(
pb
);
// sample_rate
avio_seek
(
pb
,
10
,
SEEK_CUR
);
// data_1
q
=
avio_r8
(
pb
);
avio_seek
(
pb
,
q
,
SEEK_CUR
);
// data_2
avio_r8
(
pb
);
// zeropad
if
(
avio_tell
(
pb
)
<
off
)
{
int
num_data
;
int
xd_size
=
0
;
int
data_len
[
256
];
int
offset
=
1
;
uint8_t
*
p
;
ffio_read_varlen
(
pb
);
// val_13
avio_r8
(
pb
);
// '19'
ffio_read_varlen
(
pb
);
// len_3
num_data
=
avio_r8
(
pb
);
for
(
j
=
0
;
j
<
num_data
;
j
++
)
{
data_len
[
j
]
=
ffio_read_varlen
(
pb
);
xd_size
+=
data_len
[
j
];
}
st
->
codecpar
->
extradata_size
=
64
+
xd_size
+
xd_size
/
255
;
if
(
ff_alloc_extradata
(
st
->
codecpar
,
st
->
codecpar
->
extradata_size
))
return
;
p
=
st
->
codecpar
->
extradata
;
p
[
0
]
=
2
;
for
(
j
=
0
;
j
<
num_data
-
1
;
j
++
)
offset
+=
av_xiphlacing
(
&
p
[
offset
],
data_len
[
j
]);
for
(
j
=
0
;
j
<
num_data
;
j
++
)
{
avio_read
(
pb
,
&
p
[
offset
],
data_len
[
j
]);
offset
+=
data_len
[
j
];
}
st
->
codecpar
->
extradata_size
=
offset
;
}
}
av_free
(
pb
);
}
static
void
track_index
(
VividasDemuxContext
*
viv
,
AVFormatContext
*
s
,
uint8_t
*
buf
,
unsigned
size
)
{
int64_t
off
;
int64_t
poff
;
int
maxnp
=
0
;
AVIOContext
*
pb
;
int
i
;
pb
=
avio_alloc_context
(
buf
,
size
,
0
,
NULL
,
NULL
,
NULL
,
NULL
);
if
(
!
pb
)
return
;
ffio_read_varlen
(
pb
);
// track_index_len
avio_r8
(
pb
);
// 'c'
viv
->
n_sb_blocks
=
ffio_read_varlen
(
pb
);
viv
->
sb_blocks
=
av_calloc
(
viv
->
n_sb_blocks
,
sizeof
(
VIV_SB_block
));
if
(
!
viv
->
sb_blocks
)
{
viv
->
n_sb_blocks
=
0
;
av_free
(
pb
);
return
;
}
off
=
0
;
poff
=
0
;
for
(
i
=
0
;
i
<
viv
->
n_sb_blocks
;
i
++
)
{
viv
->
sb_blocks
[
i
].
byte_offset
=
off
;
viv
->
sb_blocks
[
i
].
packet_offset
=
poff
;
viv
->
sb_blocks
[
i
].
size
=
ffio_read_varlen
(
pb
);
viv
->
sb_blocks
[
i
].
n_packets
=
ffio_read_varlen
(
pb
);
off
+=
viv
->
sb_blocks
[
i
].
size
;
poff
+=
viv
->
sb_blocks
[
i
].
n_packets
;
if
(
maxnp
<
viv
->
sb_blocks
[
i
].
n_packets
)
maxnp
=
viv
->
sb_blocks
[
i
].
n_packets
;
}
viv
->
sb_entries
=
av_calloc
(
maxnp
,
sizeof
(
VIV_SB_entry
));
av_free
(
pb
);
}
static
void
load_sb_block
(
AVFormatContext
*
s
,
VividasDemuxContext
*
viv
,
unsigned
expected_size
)
{
uint32_t
size
=
0
;
int
i
;
AVIOContext
*
pb
=
0
;
if
(
viv
->
sb_pb
)
{
av_free
(
viv
->
sb_pb
);
viv
->
sb_pb
=
NULL
;
}
if
(
viv
->
sb_buf
)
av_free
(
viv
->
sb_buf
);
viv
->
sb_buf
=
read_sb_block
(
s
->
pb
,
&
size
,
&
viv
->
sb_key
,
expected_size
);
if
(
!
viv
->
sb_buf
)
{
return
;
}
pb
=
avio_alloc_context
(
viv
->
sb_buf
,
size
,
0
,
NULL
,
NULL
,
NULL
,
NULL
);
if
(
!
pb
)
return
;
viv
->
sb_pb
=
pb
;
avio_r8
(
pb
);
// 'S'
avio_r8
(
pb
);
// 'B'
ffio_read_varlen
(
pb
);
// size
avio_r8
(
pb
);
// junk
ffio_read_varlen
(
pb
);
// first packet
viv
->
n_sb_entries
=
viv
->
sb_blocks
[
viv
->
current_sb
].
n_packets
;
for
(
i
=
0
;
i
<
viv
->
n_sb_entries
;
i
++
)
{
viv
->
sb_entries
[
i
].
size
=
ffio_read_varlen
(
pb
);
viv
->
sb_entries
[
i
].
flag
=
avio_r8
(
pb
);
}
ffio_read_varlen
(
pb
);
avio_r8
(
pb
);
viv
->
current_sb_entry
=
0
;
}
static
int
viv_read_header
(
AVFormatContext
*
s
)
{
VividasDemuxContext
*
viv
=
s
->
priv_data
;
AVIOContext
*
pb
=
s
->
pb
;
int64_t
header_end
;
int
num_tracks
;
uint32_t
key
,
k2
;
uint32_t
v
;
uint8_t
keybuffer
[
187
];
uint32_t
b22_size
=
0
;
uint32_t
b22_key
=
0
;
uint8_t
*
buf
=
0
;
avio_skip
(
pb
,
9
);
header_end
=
avio_tell
(
pb
);
header_end
+=
ffio_read_varlen
(
pb
);
num_tracks
=
avio_r8
(
pb
);
if
(
num_tracks
!=
1
)
{
av_log
(
s
,
AV_LOG_ERROR
,
"number of tracks %d is not 1
\n
"
,
num_tracks
);
return
AVERROR
(
EINVAL
);
}
v
=
avio_r8
(
pb
);
avio_seek
(
pb
,
v
,
SEEK_CUR
);
avio_read
(
pb
,
keybuffer
,
187
);
key
=
decode_key
(
keybuffer
);
viv
->
sb_key
=
key
;
avio_rl32
(
pb
);
for
(;;)
{
int64_t
here
=
avio_tell
(
pb
);
int
block_len
,
block_type
;
if
(
here
>=
header_end
)
break
;
block_len
=
ffio_read_varlen
(
pb
);
block_type
=
avio_r8
(
pb
);
if
(
block_type
==
22
)
{
avio_read
(
pb
,
keybuffer
,
187
);
b22_key
=
decode_key
(
keybuffer
);
b22_size
=
avio_rl32
(
pb
);
}
avio_seek
(
pb
,
here
+
block_len
,
SEEK_SET
);
}
if
(
b22_size
)
{
k2
=
b22_key
;
buf
=
read_vblock
(
pb
,
&
v
,
b22_key
,
&
k2
,
0
);
if
(
!
buf
)
return
AVERROR
(
EIO
);
av_free
(
buf
);
}
k2
=
key
;
buf
=
read_vblock
(
pb
,
&
v
,
key
,
&
k2
,
0
);
if
(
!
buf
)
return
AVERROR
(
EIO
);
track_header
(
viv
,
s
,
buf
,
v
);
av_free
(
buf
);
buf
=
read_vblock
(
pb
,
&
v
,
key
,
&
k2
,
v
);
if
(
!
buf
)
return
AVERROR
(
EIO
);
track_index
(
viv
,
s
,
buf
,
v
);
av_free
(
buf
);
viv
->
sb_offset
=
avio_tell
(
pb
);
if
(
viv
->
n_sb_blocks
>
0
)
{
viv
->
current_sb
=
0
;
load_sb_block
(
s
,
viv
,
viv
->
sb_blocks
[
0
].
size
);
}
else
{
viv
->
current_sb
=
-
1
;
}
return
0
;
}
static
int
viv_read_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
{
VividasDemuxContext
*
viv
=
s
->
priv_data
;
AVIOContext
*
pb
;
int64_t
off
;
int
ret
;
if
(
avio_feof
(
viv
->
sb_pb
))
return
AVERROR_EOF
;
if
(
viv
->
current_audio_subpacket
<
viv
->
n_audio_subpackets
)
{
AVStream
*
astream
;
int
size
=
viv
->
audio_subpackets
[
viv
->
current_audio_subpacket
+
1
].
start
-
viv
->
audio_subpackets
[
viv
->
current_audio_subpacket
].
start
;
pb
=
viv
->
sb_pb
;
ret
=
av_get_packet
(
pb
,
pkt
,
size
);
if
(
ret
<
0
)
return
ret
;
pkt
->
pos
+=
viv
->
sb_offset
+
viv
->
sb_blocks
[
viv
->
current_sb
].
byte_offset
;
pkt
->
stream_index
=
1
;
astream
=
s
->
streams
[
pkt
->
stream_index
];
pkt
->
pts
=
av_rescale
(
viv
->
audio_sample
,
astream
->
time_base
.
den
,
astream
->
time_base
.
num
)
/
astream
->
codecpar
->
sample_rate
;
viv
->
audio_sample
+=
viv
->
audio_subpackets
[
viv
->
current_audio_subpacket
].
pcm_bytes
/
2
/
astream
->
codecpar
->
channels
;
pkt
->
flags
|=
AV_PKT_FLAG_KEY
;
viv
->
current_audio_subpacket
++
;
return
0
;
}
if
(
viv
->
current_sb_entry
>=
viv
->
n_sb_entries
)
{
if
(
viv
->
current_sb
+
1
>=
viv
->
n_sb_blocks
)
return
AVERROR
(
EIO
);
viv
->
current_sb
++
;
load_sb_block
(
s
,
viv
,
0
);
viv
->
current_sb_entry
=
0
;
}
pb
=
viv
->
sb_pb
;
off
=
avio_tell
(
pb
);
off
+=
viv
->
sb_entries
[
viv
->
current_sb_entry
].
size
;
if
(
viv
->
sb_entries
[
viv
->
current_sb_entry
].
flag
==
0
)
{
int
v_size
=
ffio_read_varlen
(
pb
);
ffio_read_varlen
(
pb
);
ret
=
av_get_packet
(
pb
,
pkt
,
v_size
);
if
(
ret
<
0
)
return
ret
;
pkt
->
pos
+=
viv
->
sb_offset
+
viv
->
sb_blocks
[
viv
->
current_sb
].
byte_offset
;
pkt
->
pts
=
viv
->
sb_blocks
[
viv
->
current_sb
].
packet_offset
+
viv
->
current_sb_entry
;
pkt
->
flags
|=
(
pkt
->
data
[
0
]
&
0x80
)
?
0
:
AV_PKT_FLAG_KEY
;
pkt
->
stream_index
=
0
;
for
(
int
i
=
0
;
i
<
MAX_AUDIO_SUBPACKETS
-
1
;
i
++
)
{
int
start
,
pcm_bytes
;
start
=
ffio_read_varlen
(
pb
);
pcm_bytes
=
ffio_read_varlen
(
pb
);
if
(
i
>
0
&&
start
==
0
)
break
;
viv
->
n_audio_subpackets
=
i
+
1
;
viv
->
audio_subpackets
[
i
].
start
=
start
;
viv
->
audio_subpackets
[
i
].
pcm_bytes
=
pcm_bytes
;
}
viv
->
audio_subpackets
[
viv
->
n_audio_subpackets
].
start
=
(
int
)(
off
-
avio_tell
(
pb
));
viv
->
current_audio_subpacket
=
0
;
}
else
{
int
v_size
=
ffio_read_varlen
(
pb
);
ret
=
av_get_packet
(
pb
,
pkt
,
v_size
);
if
(
ret
<
0
)
return
ret
;
pkt
->
pos
+=
viv
->
sb_offset
+
viv
->
sb_blocks
[
viv
->
current_sb
].
byte_offset
;
pkt
->
pts
=
viv
->
sb_blocks
[
viv
->
current_sb
].
packet_offset
+
viv
->
current_sb_entry
;
pkt
->
flags
|=
(
pkt
->
data
[
0
]
&
0x80
)
?
0
:
AV_PKT_FLAG_KEY
;
pkt
->
stream_index
=
0
;
}
viv
->
current_sb_entry
++
;
return
0
;
}
static
int
viv_read_close
(
AVFormatContext
*
s
)
{
VividasDemuxContext
*
viv
=
s
->
priv_data
;
av_freep
(
&
viv
->
sb_pb
);
av_freep
(
&
viv
->
sb_buf
);
av_freep
(
&
viv
->
sb_blocks
);
av_freep
(
&
viv
->
sb_entries
);
return
0
;
}
static
int
viv_read_seek
(
AVFormatContext
*
s
,
int
stream_index
,
int64_t
timestamp
,
int
flags
)
{
VividasDemuxContext
*
viv
=
s
->
priv_data
;
int64_t
frame
;
if
(
stream_index
==
0
)
frame
=
timestamp
;
else
frame
=
av_rescale_q
(
timestamp
,
s
->
streams
[
0
]
->
time_base
,
s
->
streams
[
stream_index
]
->
time_base
);
for
(
int
i
=
0
;
i
<
viv
->
n_sb_blocks
;
i
++
)
{
if
(
frame
>=
viv
->
sb_blocks
[
i
].
packet_offset
&&
frame
<
viv
->
sb_blocks
[
i
].
packet_offset
+
viv
->
sb_blocks
[
i
].
n_packets
)
{
// flush audio packet queue
viv
->
current_audio_subpacket
=
0
;
viv
->
n_audio_subpackets
=
0
;
viv
->
current_sb
=
i
;
// seek to ith sb block
avio_seek
(
s
->
pb
,
viv
->
sb_offset
+
viv
->
sb_blocks
[
i
].
byte_offset
,
SEEK_SET
);
// load the block
load_sb_block
(
s
,
viv
,
0
);
// most problematic part: guess audio offset
viv
->
audio_sample
=
av_rescale_q
(
viv
->
sb_blocks
[
i
].
packet_offset
,
av_make_q
(
s
->
streams
[
1
]
->
codecpar
->
sample_rate
,
1
),
av_inv_q
(
s
->
streams
[
0
]
->
time_base
));
// hand-tuned 1.s a/v offset
viv
->
audio_sample
+=
s
->
streams
[
1
]
->
codecpar
->
sample_rate
;
viv
->
current_sb_entry
=
0
;
return
1
;
}
}
return
0
;
}
AVInputFormat
ff_vividas_demuxer
=
{
.
name
=
"vividas"
,
.
long_name
=
NULL_IF_CONFIG_SMALL
(
"Vividas VIV"
),
.
priv_data_size
=
sizeof
(
VividasDemuxContext
),
.
read_probe
=
viv_probe
,
.
read_header
=
viv_read_header
,
.
read_packet
=
viv_read_packet
,
.
read_close
=
viv_read_close
,
.
read_seek
=
viv_read_seek
,
};
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